If we had taken such effective measures earlier, the river ___ so seriously now.
| A．is not polluted |
| B．would not be polluted |
| C．had not been polluted |
| D．would not have been polluted |
The people from all over the world demand that reforms______.
| A．have been done | B．be done | C．are done | D．might be done. |
Who is it______have the most important role to play in stopping Yellow River erosion?
A,whoB.that C.which D.whom
He_______his million and found different way to be happy in his life.
| A．turned his back to | B．turned back on | C．turned backs on | D．turned his back on |
Many people spend half their time______ways of getting rich.
| A．dreaming on | B．to dream up | C．dreaming up | D．dreamt up |
He_______just before the concert started.
| A．dropped out | B．dropped away | C．dropped in | D．dropped up |